Authorities say four Oregon teenagers accused of shooting a fellow high school student with a BB gun and carving a swastika into his forehead had spent an evening sketching out ideas for torturing him.

According to an affidavit filed Tuesday, the February 10 attack went as planned, until they released the 16-year-old boy to pull cash from an ATM. He fled to a nearby store instead and called police.

The teen told investigators he was lured to the shed by 15-year-old Jenna Montgomery. There, he said 15-year-old Blue Kalmbach shot him with a BB gun and used a box cutter to cut the swastika.

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Tried as an adult: Mugshot of Jenna Montgomery who is accused of luring the victim.

Accused: Blue Christian James Kalmbach (left) and Jess Taylor (right) are being held on a $3 million bail bond

A similar attack was portrayed in the 2009 World War II movie 'Inglourious Basterds.'

All five teens attend the same southeast Portland high school.

On the morning of the alleged assault, Montgomery spoke with the victim there and asked to hang out after school. They walked behind a house nearby, according to the affidavit, and Montgomery led him to a shed in the backyard.

'Mr. Taylor stated that he helped formulate the plan to torture (the victim),' Multnomah County assistant district attorney Chris Ramras wrote in the affidavit, 'and assisted by writing down several ideas.'

Kalmbach pointed a gun - later identified as a BB gun - at the victim and told him to take off his shirt.

No glory: The attack may have been inspired by the film Inglourious Basterds

Nazi hunters: The Tarantino film stars Brad Pitt as the leader of a band of Nazi hunters who carves swastikas into Nazis' foreheads

Jenna Montgomery allegedly told police that she and the three other accused concocted the plan the night before the attack and agreed that she would be 'the bait'

Scene: The shed where the violent assault occurred, which is behind a house in southeast Portland. Four teens have been charged

Police have said they are struggling to determine a motive for why the teens allegedly lured Dustin Murrain to this shed and brutally attacked him

The victim told investigators that when he complied, Kalmbach shot him in the chest, the groin and one of his hands. Then Kalmbach used a box cutter to cut the swastika into the victim's forehead, according to the affidavit.

When Murrain questioned what his attackers wanted, they demanded he return with a skateboard and money, the affidavit said.

They rifled through his pockets and stole his iPod, the papers said.

Murrain managed to escape and fled to a nearby auto service shop for assistance.

He was taken to OHSU Hospital for treatment.

Police then located the suspects at 3266 S.E. 111th Ave.

Montgomery told investigators that she and the boys had concocted the scheme the night before and that she was to be the 'bait' to lure Murrain to the shed, the affidavit said.

'She stated that they had all discussed a plan to lure him over to torture him,' the affidavit said.

Kalmbach, in an interview with police detectives, admitted he had shot Murrain in the chest and groin, carved a swaskika into his forehead and had forced him to eat cat feces, the affidavit said.

Police have suggested the victim had been perceived as a bully and the four saw the attack as retaliation.

Freaky: A Facebook photo of Jenna Jean Montgomery. The 15-year-old allegedly admitted to police she and three other boys had concocted the plan and that she was 'the bait'

Horrific: The teens stand accused of using a boxcutter, similar to this one, to carve a swastika-like insignia into the head of Dustin Murrain

Murrain was rushed to OHSU Hospital for treatment after finally fleeing the shed

Attorneys for Taylor, Montgomery and Kalmbach could not be reached for comment Friday afternoon. It was unclear who is representing the 14-year-old boy.

The three who are 15 and older have been charged as adults. They each face about 20 counts, ranging from kidnapping to robbery and assault. The 14-year-old will be prosecuted in juvenile court per Oregon criminal law.

John Bier, principal of David Douglas High School, said Friday the alleged attackers and their victim were 'only vaguely involved' with the school - one student was headed to an alternative high school, and the rest had spotty attendance records.

The bait: Jenna Montgomery admitted luring the victim to a house where the three boys attacked him

Violent: Blue Kalmbach (left) attacked the victim and carved a swastika into his head, while Jess Taylor (right) helped formulate the plan

'They had basically chosen not to attend,' Bier said. 'We were trying to reel them back in, but they were really not having it.'

He said the 3,000-student school has not experienced more students seeking counseling since the alleged attack.

Bier said investigators told him that the five teenagers were all friends at one point, but had a falling out. He said the victim initially was lured to the shed with a promise of drugs and sex.

A Portland Police Bureau report that Bier referred to was not available Friday. Authorities have not commented on a possible motive.